Wheel truck



June 16, 1942. R. EKSERGIAN 'WHEEL T RUGK Filed June 23, 1939 2sheets-sheet 1 w. m m N I A TTORNE Y.

Junels, 1942. 'EKSERGIAN' 2,286,608

" WHEEL TRUCK' Filed June 2s, 1939j 2 sheetg-shef 2 lllllll l 'AHWWEKVPatented June 16, 1942 U'Nirso azsasos orifice 'WHEEL 'ration RupenEksel-gian, Lansdowne, Pa., assigner to Edward G. Budd ufacturingCompany, Philadelphia, Pa., a corporation lof Pennsyl- Application .lune23, 1939, Serial No. 286,771

2 Claims. (531.105-182) The present invention relates to a wheel truckwherein each wheel is independently resiliently mounted, so that thewheels are capable of individual movements in an up and down direction,to adjust 4themselves to inequalities in thetrack or roadway.

lThe invention also includes the provision of a stabilizer cooperatingwith each pair of wheels,

Y to permit such individual adjustments, but impose a torsionalrestraining moment thereon, so as to tend to keep the wheels of the pairalined frame 2 and in turn carry the axles il. A shaft 8 extendsthrough' a suitable bore 9 at each end of the frame 2,and serves as thepinfof what is substance a large hinge. The bored portions. l and Ilofthe frame 2 form the pin receiving end of one`hinge member, while thetwo axle supporting devices l jointly, (on each end of the frame 2),form the other hinge member, boredas at I2 to receive the pin 8.- v

Eachsupport 'I advantageouslymay have a straight arm I3 extendingsubstantially at right with one another under normal conditions. Thisstabilizer may advantageously take the form of a rubber element securedto suitable means which may be. connected' to Y.the said Wheels.

' The rubber maybe directly vulcanized to said means Aor secured in anyAother preferred way.

As an alternative, torsional elements may be used as stabilizers,` forinstance metallic rods ora }tubes, and "if desired both the-rubber andthe metallic devices may be used jointly.

Other features and advantages of the iriven#v `tion will be understood`from the present specication, whereina preferred form is disclosed,

horiof a portion thereof, showing the stabilizingldiskl andtheparts'cooperatlng therewith.

Fig. 4 is a diagrammatic partly sectional plan view of a portion of amodified form of truck, having' a torsionrod;

Fig. 5 is a diagrammatic partly sectional side elevation'ofl a portionof a truck, showing a modiiied form of springimounting; and

Fig. 6 is a view similar to Fig. 5 of a still further modication.

In all the gures, similar elements are designated by the same referencecharacters.

Referring first' to the form disclosed in Figs. l, 2 and 3, there isshown a bolster I mounted in a s uitable cavity 5 in the frame 2, andresting on a number of springs such as ii.' helical springs beingspecifically shown, although it will be angles to the pin 8 and also aninclined bracev I extending at a suitable angle to reach'afpoint nearthe middle oithe length of said pin, sov

that a rigid structure results, pivoted vat spaced\ portions ISand I6 onsaid pin 8. f

The said portions` I5 and I6 of the support terminate in a substantiallyrectangularmember Il which may have an upstanding ange I8 thereon to-strengthenE it; vThe frame. 2 'may have a shelf such as I9, at each endandsprings 20 will be interposed between said shelf and the bottom ofthemember I'I, so that when a load is carried by the bolster I such loadwill be transferred to the wheels 3 through said springs 20.

Obviously, although three helical springs .have

been shown under each member I1, this number vis arbitrary, as is alsoIthe precise nature o! resilient means used.

The wheels 3 may beA mounted on suitable bearings, at the ends of theaxles 4 which axles do not rotate' themselves, -but Iare mounted inuniversal supports in the-ends of the supporting Y, frames 'I so that itis possible for each axle to tilt slightly out of parallelism with thecorrespending pin 8, thus permitting the wheels' 3 to understood thatany suitable resilient supports v may be employed.v

'I'he frame 2'serves as a carrier for the axle supporting devices 1which are pivoted to the adjustv themselves independently-'of oneanother to'slight diierences of elevationl of the respective rails.

These universal supports consist of portions 21 having sphericalsurfaces at the ends of each axle 4, 'carried in thecorrespondinglyfcurved upper bearing -28 at the end of each support 1,and held thereto by the lower bearing members v25, which may be securedto the supportsl 'I by the cap screws 26'. a 1

In order to provide a stabilizing inuencefo'n such slight independentmovements of the wheels, a torsional diskmay be provided.v This consistsof a disk of rubber 2| secured totwodisks of metal 22, on oppositefacesthereof, as

by' vulcanizing it directly thertoor in'any other suitable way. Thisstructure is lbest-shot'vn in Fig. 3.

Each metal disk 22,

whichfmay consist'oiironV to one another about the pin 8, torsionalstresses will be set up in the rubber disk 2l, resisting and dampingsuch movements and tending to restore the members 1 to their normalalined relationship to one another.

Passing now to the form disclosed in Fig. 4, it

` will be seen that this embodiment is similar to the preceding form inmany respects, and differs therefrom in substituting a torsion rod forthe rubber disk.

The frame 2 here has its end lugs 29 larger than the corresponding lugs9 of Fig. 2, .but the lugs Hare identical with the lugs I`I of Fig. 2.The supporting brackets 1 of Fig. 4 are nearly identical with those ofFig. 2, but differ therefrom in that they do not need the keyways 24,since the rubber stabilizer .is not used in this form. A furtherdiierenceis that notches 30 or the like are provided on the outerportions of the arms I3, and thesenotches receive correspondingprojections or lugs 3| on the caps 32, which are pivotally mounted inthe bores 33A of lugs 29- lar opening 34 in its end, to receive acorrespondingly shaped end portion 35i of the torsion member 36, so thatthe caps 32 cannot rotate with rein the lugs II and in the arms I3 andI4 of theV brackets .1, totprovide a pivotal or hinge conaesaeo frame2.l The axle 4 is supported as before. in a universal joint consistingof a bearing in the end of arm 42 and the strap 25, which are heldtogether by screws 26.

In this embodiment either the rubber disk stabilizer or the torsion rodobviously may be provided, as preferred, or if .desired both therubberdisk and the metal rod may be used jointly.

In the form shown in Fig. 6, the structure and operation. aresubstantially the same as in Fig. 5, except, that hereboth the springs20 and 4I are used jointly. To make this possible, an extensionresiliently supported by its own resilient means,

such as a number of springs 'and cach Wheel has a limited degree offreedom to move up ordown independently'of its companion' wheel at theoth- .er end of the axle.

Torsional stabilizers are provided in each form of device, and these maydepend upon rubber or similar material, or upon a steel or other metalrod, or upon the rubber and metal jointly.

It is also obvious that the springs which supp ort the wheels may bearranged in various ways. to accomplish the desired results.

l I claim:

l. A railway truck comprising .a pair of longitudinally spaced wheel andaxle assemblies and a frame disposed between them, one pair oftransversely spaced arms connected to each axle nection between saidbrackets and the frame 2,

as in the previously described form.

The axles 4 `upon which thewheels 3 are mounted, are made just as in theFig. 2 form, that is, they have universal connections with theV brackets1, to permit tilting of the axle when necessary.

The springs 20 will take the normal forces produced by the wheels inservice, as in the preceding form, but .when one wheel is at a diierentlevel from the other on the same axle, a twist will be given to thetorsion element 36, which thus Vacts as a stabilizer in lplace of therubber disk 0f the other form.

Referring now to Fig. 5, in this form the strucand depressing them nearthe hinge joint. The

hinge pin also may be moved closer to the bolster, because of thechanged location ofthe springs.

The bracket 42 has therefore a depressed portion 43 adjacent the pin 8,so as to accommodate the springs 4I, whose upper ends bear against theunder side of a projecting end portion 44 of the and being :pivotedabout a transversely extending axis t the truck frame, spring meanslassociated with each arm and interposed between the frame i and the arm,torsion means connecting the arms of each pair of arms and arrangedconcentric with the'respectivev pivotal connection so as to stabilizethe truck frame While permitting limited independentvertical movement ofthe opposite ends of each axle with respect to said frame, said torsionmeans including a rubber disc concentric with the pivots of the pairsofarms at the op-` posite ends of the truck and interposed between andthe arm, torsion means connecting the arms them with its lateral facesanchored to the arms,

whereby the rubber is subjected to shearing'stress upon relativerotation of the associated arms.

2.- A railway truck comprising a pair of longitudinally spaced wheel andaxle assemblies and a frame disposed' between them, one pair of`transversely spaced arms'connected to each axle and being pivoted4 abouta transversely extendingv axis to the truck frame, spring meansassociated with each arm and interposed between the frame lof each pairof varms and arranged concentric with the respective pivotalconnectionso as to" stabilize the truck frame while permittinglimited independentvertical movement ofthev opposite ends of each axle with respect tosaid'frame, said torsion means including a rubber disc havingv plates`adhesively connected ,such as vulcanized to the opposite sides thereof,the disc being arranged concentric with the pivots of the pairs ofarmsat the opposite ends-of the truck and interposed betweenthem withthe plates anchored one to each of the arms to rotate therewith.

RUPEN EKSERGIAN.

